Pressure reducing and regulating valve.



w. HOCHFELDT. PRESSURE REDUCING AND REGULATING VALVE. APPLICATION FILED F3127, 1911.

- 1,033,174. Patented uly 23, 1912 "UNITED STATEST A ENT OFFICE.

WIiJLIAM HOGHFEIlD'I, OF CHICAGO, ILLINOIS, ASSIGNOR '10 SAFETY EQUIP- MEN! MANUFACTURINGCOMFANY, OF CHICAGO, ILLINOIS, A CORIORATION or ILLINOIS.

PRESSURE REDUCING AND REGULATING- VALVE.

To, all whom it may concern:

Be it known that I, WILLIAM HooHFnm'r,

section of the valve along a plane extendingboth through the main fluid passage and also through the transversely positioned valve spindle and adjusting mechanism.

The valve casing consists of a main body part 1 containing the valve mechanism proper, and detachable cup elements 2 and 3 containing valve controlling and adjust: ing mechanism. The main' casing body 1 has a hollow cavity divided by a partition into two compartments 4 and 5, into the former of which there opens a high pressureinduction passage or port' 6 and out from the latter of which there opens the low pressure eduction passage or port 6. These ports are preferably threaded to engage suitable connecting pipes. In the embodiment which I have chosen to illustrate herewith, the said partition consists of a wall having two opposite portions 7 and 8 in which throttling valve ports 9 and 10 are located, said opposite portions of the partition being connected by a curved end portion 11. On one side of the main casing is integrally mounteda radially positioned cylinder 12 openafiboth ends. This cylinder is closed by a" cupshaped element 13 slidably embracing it .on the outside, the bottom 14 of said cup serve ing to close the outer end of said cylinder 12. The said bottom 14 has a small periorat ion 15 to permit the escape of any fluid that may collect in said cup. The'inner end of this cup is provided with an outwardly turned flange 16 against which pressure is received from a heavy spiral spring '17 engaging therewith which surrounds and extends outwardly beyond said cup 13. The large outer cup element 2, aforesald, is threaded to the main casing body-1 at 18. The closed outer Specification of Letters Patent. Application filed February 27., 1911. Serial No. 611,223. "v

. end 19 ofithis outer cup 2 has aperforated central boss 20 in which is mounted'an ad-' ustm'g screw 21 pointing inwardly. The,

outer end of this screw has a slot 22 adapted to be turned by a screwdriver or the like. This outer end is protected from injury or accidental turning by means of an internally Patented July 23, 1912..

threaded cap 23 adapted tov engage the thread ed outer ends of said screw and fit tightly against the saidboss 20 when in place. This cap has a cavity 24: in its upper portion to give clearance .to the head of said screw. The lower end of this screw engages a disk 25 at its central point 26 where there is a conical depression adapted to receive the conical point 2110f the screw.v An annular flange or radial shoulder is provided on disk 25 to engage the outer end of said spring 17. On the opposite side of the main casing body 1 from the said adjusting screw .1s an inwardly turned cup-shaped cylinder 3 threaded at 27 to the interior of a suitable opening provided therefor in: the wall of the ,main casing 1. The inside of this cup v is cylindric'ally shaped corresponding to the first said cylinder 12 on' the opposite side.

The said valve ports 9. and 10 have valves 28:

and 29 c'o-acting therewith, said valves being mounted on a stem or spindle 30 on the opposite ends of which are attached pistons 31' v l and 32 coactin with the cylinders 12 and 3 respectively. The piston 32. is hollow and provided with a relatively weakspiral spring 33 on the inside, one end of which rests against the closed end 3 of the cup cylinder 3- and the other presses inward against the-piston 32. r This spring 33 serves only to keep the stem and valves pushed forward into co-active relation with the opposing spring 17 and prevents any possible looseness or uncertainty of action under; differentconditions of adjustment.

, The stem '30 is provided with a transverse perforation 34 which, by means of a longitudinal'perforation 35, connects from the eduction chamber to the interior of the cup;

shaped piston 3. j

The operation of my valve is as follows: When high pressure fluid, as-steam, passes through the valve in the direction indicated" by the arrows, it first enters the high pressure chamber 4: from whence it passes through the open valve ports 9 and 10 mto the low pressure chamber 5, and thence out through the passage 6'. As the valves are normally held open by means of the heavy spring 17 they will so remain until the pressure in the chamber 5 reaches the predetermined value. Then the pressure exerted on the piston 29 by the fluid which passes from the low pressure chamber 5 through the passages 34-35 and the pressure exerted on the piston 31, will cause the valves 28 and 29 to close sufliciently to maintain the proper pressure,

It will be noted that the pistons 31 and 32 are provided with annular packing grooves 36 and}? respectively. These are preferably left open when steam is used, as in operation water of condensation tends to seep outward and fill the rings and serves as a packing sutlicient for the purpose.

Whatever steam or other fluid escapes through the cylinder 12 past piston 31 finds its way out of the casing through the hole 15 in cup 13 and hole 38 in the side of cup 2.

When it is desired to clean the valve itis only cessary to unscrew the cups 2 and 3, whereupon the various parts contained therein may be readily removed Removal of cap 3 alone enables withdrawal of the stem and valves 28 and 29 thereon. It will be seen that in these operations the adjut-ing screw 21 is not affected. After the valve is reassembled, in case it is desired to change the adjustment, it is only necessary to remove the cap 23 and then turn thescrew 21 to whatever extent is necessary to maintain the desired pressure. This may be done best when the pressure is on.

The passages 3435 may be omitted, in which case the parts 3 29 32 serve as a dashpot to retard the opening and closing movements of the valve. In use, waterof condensation collects in the cap 3, and is forced j in and out of the cap 3 through the space between the piston 32 and the cap 3, as the valve opens and closes. While I have herein described more or lessprecisely the details of construction, 1 do not wish to be understood as limiting myself thereto, as I' contemplate changes in form,and the proportion of parts, andsuch other modifications as would occur to one skilled in the art, as circumstances may suggest or render expedient, without departing from the scope. of my invention. I claim as my invention: 4 1. In a fluid pressure reducing and regulating valve, in combination, a main casing body having fluid-inlet and outlet ports, inlet and outlet chambers into which said 50 ports lead respectively, a partition separating said chambers, said partition having a valve port therein, a valve co-acting with said valve port, a stem on which said valve is attached, pistons on opposite ends of said stein, cylinders with which said pistons corneama act attached to opposite sides of said main.

casing and opening into said outlet chamber, a heavy spring'pressing inward against one of said pistons tending to open said valve, protected and concealed means to adjust .the pressure of said spring, a relatively weak spring pressing. inward against the other of said pistons tending to close said valve, the cylinder vwith which the second said piston co-acts being integrally closed at its outer end, and a fluid passage leading from the said outlet chamber to the interior of the said cylinder back of the second said piston. g

2. In a fluid-pressure reducing and regulatingvalve, in combination, a main casingbody, having an induction port on one side and an eduction port on the other, corresponding chambers into which said ports lead respectively the one being contained within the other, a curved partition separating said chambers and having opposite walls in whichare valve ports respectively in coaxial alinement, valves co-acting with said valve ports respectively, a spindle on which said valves are attached, pistons on opposite :ends of said spindle, cylinders with which said'pistons co-act attached to opposite sides of said main casing, and opening into the eduction chamber, a heavy'spring pressing inward against one of said pistons tending to open said valve, concealed and protected meansto adjust the pressure of said spring,

a relatively weak spring pressing inward against the other of sald pistons tending to .close said valve, the cylinder with which the second said piston co-acts being integrally closed at its outer end, and a fluid passage leading from said eduction chamber to the interior of the said cylinder back of the second said piston.

3. In a devlce of the class-described, in combination, a main caslng-body, induction and eduction chambers respectively, a partition separating said chambers, a valve port in said partition, main ports openinginto jsaid chambers respectively, a cylinder intelgral with said casing and opening into said ieduction chamber at its inner end, a recip- {rocatory cup slidably embracing said cylin -der andclosing its outer end, a powerful spring pressing inward against said cup, a bearing plate engaging the outer end of said :spring, an inwardly turned cup-shaped ele- .ment inclosing said spring and detachably engaging said body-casing, an adjusting screw radially positioned in the closed end of said spring inclosing cup-shaped element adjacent said bearing plate and co-acting with the latterto regulate thepressure of said spring, a removable cap inclosing the outer end of said screw, an opening in said body-casing opposite said cylinder, an inwardly turned cup-shaped cylinder threaded within sald openlng, a valve co-acting with said valve'port, a spindle on which said valve is mounted, a piston on each end of said spindle, one co-acting with the first said cylinder and engaging the closed end of the said reci-procato on and the otherco-acting with the cylindricalinterior of the opposlte cup-shaped cylinder, the latter piston being cup-sha ed with its open end turned outward, a re atively weak spring (Bo-acting between thelast said cup-.shaped-cylinder and co-acting piston, anda passage leading from said eduction chamber to the space back of the last said piston. 4.111 a device of. the class described, a main casing, a partition separating lsame into two compartments, a high-pressure port leading to, one and'a low pressure port to. the other, a valve ort in said part tion, a valve co-acting wi said port, a spindle on which said valve is mounted, constant means" acting .on one end of said spindle tending to push said valve. open, an outwardly turned cup-shaped piston attached to the other end of said spindletepd'mgjto; push said valve closed, a cylinder in which said piston co-acts, closed at its outer end, .a compressed spring coacting between said ylinder and, p ston, and a passagelin-saidspindle and piston leading from the low pressure chamber to the space in said-cylinder back of said piston.

5. In a reducing valve, in combination, a

therefor, an eduction chamber and port therefor, a partition between said cham ers, a plurality of ports in said partition, valves co-acting with the ports in said partition, one. valve being on the/induction side and anotheron the eduction side of said partition, ri' id reciprocatory means to support said va ves, cylinders on opposite sides of said casing, pistons therefor," said pistons carrying said 'reciprocatoi'ymeans for sup porting the valves, said pistons having annulargro'oves adapted to collect water of condensation to serveas packing, one of said cylinders being detachable, the/ said pistons and supporting-means being removable. as 'a' whole when the saidcylin e In testimon whereof I aflix my signature in presence'o two-witnesses.

HOCHFELDT.

--Witnesses:-' j

Josnrn R. B' Jr.,

Gaonon L. GHINDAHL. I.

r is detached. v 50 body casing, aninduction chamber and port 

